Quantum dot display

Quantum dots (QDs) are semiconductor particles a few nanometres in size, having optical and electronic properties that differ from larger particles due to quantum mechanics. They are a central topic in nanotechnology.

Quantum dots are valued for displays because they emit light in very specific gaussian distributions. This can result in a display with visibly more accurate colors.

A conventional color liquid crystal display (LCD) is usually backlit by fluorescent lamps (CCFLs) or conventional white LEDs that are color filtered to produce red, green, and blue pixels. Quantum dot displays use blue-emitting LEDs rather than white LEDs as the light sources. The converting part of the emitted light is converted into pure green and red light by the corresponding color quantum dots placed in front of the blue LED or using a quantum dot infused [灌输; 泡制] diffuser [混合; 扩散] sheet in the backlight optical stack. Blank pixels are also used to allow the blue LED light to still generate blue hues. This type of white light as the backlight of an LCD panel allows for the best color gamut at lower cost than an RGB LED combination using three LEDs.

• infuse [Origin: infuser, from Latin infundere, from fundere 'to pour']
• diffuse [Origin: diffuser, from Latin diffusus, 过去分词 of diffundere 'to spread out']

A color gamut [范围] is a measure of the visible wavelength range within a particular color space that a light source can produce. It is typically expressed as an area within the CIE [国际照明委员会] 1931 chromaticity diagram and is subsequently used to determine how much of the visible spectrum can be expressed.

color space

Another method by which quantum dot displays can be achieved is the electroluminescent (EL 电致发光) or electro-emissive method. This involves embedding quantum dots in each individual pixel. These are then activated and controlled via an electric current application. Since this is often light emitting itself, the achievable colors may be limited in this method. Electro-emissive QD-LED TVs exist in laboratories only.

The ability of QDs to precisely convert and tune a spectrum makes them attractive for LCD displays. Previous LCD displays can waste energy converting red-green poor, blue-yellow rich white light into a more balanced lighting. By using QDs, only the necessary colors for ideal images are contained in the screen. The result is a screen that is brighter, clearer, and more energy-efficient. The first commercial application of quantum dots was the Sony XBR X900A series of flat panel televisions released in 2013.

AMOLED is a display technology and stands for Active Matrix Organic Light Emitting Diodes. It is a type of OLED display. OLED stands for Organic Light Emitting Diode. Super AMOLED is an AMOLED display that has an integrated touch function: Instead of having a layer that recognizes touch on the top of the screen, the layer is integrated into the screen itself.

这么个super法。S-Video (also known as separate video and Y/C) is a signaling standard for standard definition video, typically 480i or 576i. By separating the black-and-white and coloring signals, it achieves better image quality than composite video, but has lower color resolution than component video. 不是Super Video. i代表interlaced (隔行; 交错), p代表progressive (逐行)。

In June 2006, QD Vision announced technical success in making a proof-of-concept quantum dot display and show a bright emission in the visible and near infra-red region of the spectrum. A QD-LED integrated at a scanning microscopy tip was used to demonstrate fluorescence near-field scanning optical microscopy (NSOM) imaging. 2006年6月，QD Vision宣布在制作概念验证量子点显示器方面取得了技术成功，并在光谱的可见光和近红外区域显示出明亮的发射。使用集成在扫描显微镜尖端的QD-LED演示荧光近场扫描光学显微镜（NSOM）成像。

According to an equation, the best resolution achievable with optical light is about 200 nm. With the introduction of NSOM (also known as SNOM, scanning near-field optical microscopy), this limitation no longer exists, and optical resolution of < 50 nm can be achieved.

六级/考研单词: particle, electron, differ, mechanic, emit, liquid, crystal, filter, convert, correspond, stack, diffuse, diagram, spectrum, embed, activate, seldom, tune, necessity, integrate, scan, accord, equate, resolve

NSOM (SNOM): History and Description